bc8d3f97eb
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103490 91177308-0d34-0410-b5e6-96231b3b80d8
33 lines
1009 B
C++
33 lines
1009 B
C++
//===----------------------------------------------------------------------===//
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//
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// ÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊThe LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <thread>
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// template <class Clock, class Duration>
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// void sleep_until(const chrono::time_point<Clock, Duration>& abs_time);
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#include <thread>
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#include <cstdlib>
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#include <cassert>
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int main()
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{
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typedef std::chrono::system_clock Clock;
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typedef Clock::time_point time_point;
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typedef Clock::duration duration;
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std::chrono::milliseconds ms(500);
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time_point t0 = Clock::now();
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std::this_thread::sleep_until(t0 + ms);
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time_point t1 = Clock::now();
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std::chrono::nanoseconds ns = (t1 - t0) - ms;
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std::chrono::nanoseconds err = ms / 100;
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// The time slept is within 1% of 500ms
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assert(std::abs(ns.count()) < err.count());
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}
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